import { getMenu } from '@/api/user'
import { asyncRoutes, constantRoutes } from '@/router'
import Layout from '@/layout'

/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

// export function generaMenu(routes, data) {
//   const len = data.length
//   for (let i = 0; i < len; i++) {
//     if (data[i].parentId === 0) {
//       const menu = {
//         path: data[i].path + '',
//         component: Layout,
//         alwaysShow: data[i].alwaysShow,
//         redirect: data[i].redirect + '',
//         name: data[i].name + '',
//         meta: { title: data[i].title + '', icon: data[i].icon },
//         children: []
//       }
//       for (let j = 0; j < len; j++) {
//         if (data[i].id === data[j].parentId) {
//           const viewPath = data[j].component
//           const childrenList = {
//             path: data[j].path + '',
//             component: (resolve) => require([`@/views/${viewPath}`], resolve),
//             name: data[j].name + '',
//             meta: { title: data[j].title + '', icon: data[j].icon },
//             hidden: data[j].hidden
//           }
//           menu.children.push(childrenList)
//         }
//       }
//       routes.push(menu)
//     }
//   }
// }

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise(resolve => {
      let accessedRoutes
      if (roles.includes('admin')) {
        accessedRoutes = asyncRoutes || []
      } else {
        accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
      }
      commit('SET_ROUTES', accessedRoutes)
      resolve(accessedRoutes)

      // getMenu().then(response => {
      //   const data = response.data
      //   generaMenu(asyncRoutes, data)

      //   let accessedRoutes
      //   if (roles.includes('admin')) {
      //     accessedRoutes = asyncRoutes || []
      //   } else {
      //     accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
      //   }
      //   commit('SET_ROUTES', accessedRoutes)
      //   resolve(accessedRoutes)
      // })
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
